CK has challenged you! Are you up for the challenge?

CK built this bridge out of balsa wood a long time ago. It held 55 lb on it before it broke! Can you build a better bridge?


If you beat CK's 55 lbs, you win a a pizza!

BUT...before you can start, you should practice.

Goal #1: Build a mock bridge out of the materials provided. Your bridge must be 1 foot in length, and cannot weigh more than 2 lb.
  • Day 1:
    • Look at materials available, decide what you might want to use.
    • Draw a detailed sketch of your proposed bridge.
    • Get it approved by a teacher.
  • Day 2:
    • Play an online bridge building game.
    • Redesign your plan, if necessary.
  • Day 3:
    • Start building!!
  • Day 4:
    • Finish building (if necessary).
    • Test your bridge!! (Good luck!)

Now you are ready for the challenge!

Goal #2: Build a bridge out of balsa wood that can hold more than 55 lb.